Electromechanical interlock for elevators



Aug. 18, 1925.

C. NGRTSDN ELECTROMECHANICAL INTERLOCK FOR ELEVATOES .W m. J

S151, mmf-v5 f Aug. 1s, 1925.

, 1,550,449 C. N ORTO N EL'CTROKECHANICAL INTERLOCK FOR ELEVATORS Filed Aug. 2. 1923 I 5 Sheets-Shet 2 Aug. 1a, 1925.",

c. NORTONl ELECTROMECHANICAL INTERLOCK FOR ELEVATORS Filed Aug. 2. 192.3 3 sheets-sheet Patented Aug. 18, TLS?? CLUSTER-D NRTQN,

MTW mm@ wognum om Mgmtm2o.

ew York ofizhe Unfc, States, omi a femdom 5 and Stm@ of New minnow und. useful )Improvements in Elec in courogy" of New Ym'k Yoda, how inveno ce1'- romedmnioal nterlocks 'for Eevatols., of

l which the following is a sp vy mvonlon rebates to 9u ojwnnilg apparatus. of che Cass wherein or vices me employed for `moving; o dom;

lovaior 'WeB- doo n and vico; verso as an oo'vator dooie or e from open to closed positie) by the uso of appiod manual. o1* other owe?.

The object oi my pi' provid lsimimi power 1 as door opemiog and dos;

thmugh the doofe opening 4dosing; omi

To *hs @n my mvention gontmily m the, combmzmon op: mechanism o?? which. serves lio lock n momoor 9.1161 egress consists?,

movm und.,

#not 'Whoo tho tho olocinfo @moll is ro- "mima ioni@ of t MSU m *me @nimh ond ik@ con View 3 ,shows n dmail cho ing; door mimi brackoi; o1: ,Studdmg or wail of the eev'ator slm-ft ov modification in tho tho. Logggo :um @sich Fig. 4 illustrates a. means for Connecting to tho alectro SW.' 1lb Fig. 5 Shows 9. evco which may be our poyefi for operating the co ch in n, pushbuton sysom of eevaior Qontrol l incotges am oevator wou doofwwih'xoh may foo of Hm, sdn'g typo. The door do ngsmcl opening mechanism here shown. as o' the toggle arm yo olholzgh ho in- Vontou moy be applica* likewise 'io othwz forms employ'mg a lover or oves o imparting movement to tho door. @no of Suid :mos 2 is pvoted, as indicated, to be Slidzmd the ohev 2 is pvotod :n a abutment seemed io fi.

ohorwo xedy supported. THM. toggo arm System or levers thereo :we wvomly connected ogetho as ai 3 and as WGH under 'stood in the art. Sa toggle may be operated :is also WGH undersood in the ari; by n. nzmlo or by oylnder 5 or in any ox'wg' osiofl mommy.. m the Case of "the a'fo devia@ the powor may oe pnouma'o mi obor power or may be, powolstoiod imA spring-pressed vent the arm 2 from swinging upward in the arc of a circle which itmust do in order that the toggle may carry the door 1 back from the tlosedposition indicated in Fie'. 1 and in the direction of the arrow 9 in. order to open the door. Gravity or a springl ma)v serve to normally hold or assist in holding the locking catch 7 in the normal position shown. lVhen, however, said catch is raised to tree the arm 2 the latter maj: swing upwardly in the door opening movement.

2S) indicates the casing of an interlocking switch of any desired type or form applied to act on an operating or controlling circuit of the motive power by which the car is moved in such a manner that in one position of the switch the ear may be moved by manual or automatic control while iu the other position the apparatus is rendered inoperative to move the car. The manner of connecting a switch having this function into the circuits is well understood in the art and need not be further particularly described. Circuit wires for said switch are indicated at 10 10. The operating member ot said switch, which membervmay be of any desired form or form suited to the type of switch employed, is indicated at 12.`

ln the present instance I have shown my invention as carried out by the use of a t Tpo of switch substantially like that descri ed in my application for patent tiled February 2nd 1923, Serial No. (316,485, and having two *circuit closing members 1l il which normally tend to engage one another and close the circuit of 10 10. A. reciprocating bar or block of insulating material like bakelite or other suitable material constitutes the operating member 12 and is mounted in position between the circuit closing arms 1l 11 and is adapted to be forced between and separate said arms to break the circuit. In the normal position or circuit closing position said block or bar 12 occupies the position indicated in full lines in Fig. 3. Said block or other operating member of the switch is attached to link 12A? and said link is in turn joined'to the latch cpan arm 14 extending therefrom by means adjustable it desired longitudinallyI to adjust the throw of the parts as indicated at 13. 'When it is desired to operate the toggle arm to open the door it is necessary to lift the latch 7 and in so doing the switch is operated to break the interlocking control circuit7 thereby stopping or rendering it impossible to further operate the car by its motive power.

The operating device for catch or latch and at thel ing the switch is typied by the bar or rod ti suitably guided and working vertically.

Said lifting bar which may be operated by any desired means is .operatively connected lifting the same time operatasse with the latch and switch by means oil a toe or head arranged beneath the latch to engage and lift the latch and at the same time operate a switch when the rod is lifted or by other suitable means.

ln applying my invention to a system wherein the car is operated under the control of au attendant on the car who applies or cuts otl' the motive power and manipulates the well door operating or control mechanism, said bar may be actuated by 1am l5 or other device suitably mounted on the car and adapted to be thrust sidewise by the operator by means of a pedal 0r other means. against the vertical arm of a bellerank lever 1T whose other arm is connected to the lifting bar (i.

The cani 15 mav be, as shown, of the forni and extent usually emploved and have cam or engaging surface o sufficient length iu a vertical direction to permit it to op' crate upon the bell-crank lever or other 'le vice operatively connected with the la' when the car floor 16 is within a cert'v limited distance above or below the landii'i floor, so that it is not necessary in the of. eration of the car to bring the car floor landingfloor to exactly the same level fore the landing door can be opened. Gu" side of the limits determined by the len of the engaging surface 15 the bell-cranlz cannot be operated for the purpose of piacing the door operating mechanism in opere," tive condition to open said door.

In Fig. 1 the Car is shown at the landing with the cam in position read to lift the latch when the cam is thrust sidewise in the usual way. As soon as the latch is lifted the toggle may be operated, thus swingiiner the arm 2 upwardly and causing the we door to move in the direction of the arrow 9. The pin or dog S 'then moves under the latch while'at the same time the arm acts upon the circuit breaker so as to render the motive power mechanism or controllin devices ,therefor ino erative electrical? te move the car away tiom the lan'din hun ther movement of the ear can only tro place after the switch is permitted to resume ite? normal position by closing the-door and than restore the circuit o circuits to normal con:J dition. The latch remains lifted while tha door is open owing to the fact that itr'iides upon the dog 8 and sustains the Switch in the interlocking condition until the arm Il is thrown down suiciently to close the door. Ou completion of this movement the latch operatively engafres the dog and locks the operating arm 2 in the position indicated in the Flg. 1.

At this time and not until this time can the operating member 12 of the switch reach position such that the interlocking switch would closel the circuit. When the door is thus locked the motive power may be com tio the controller' hns heen hrown troiier so ,than ih@ cur may over the electric controitroied or applied the nourri; or

iing or operating eircuitis in any.' desired Way.

The toggle arms or ievers shown, Ween they ure straight7 ohriousiy ioek the door against. movement', by any extraneous force op )hed to the riool' itseif while? moreover, loc (ing of the door under norrnui conditions is fnrher insured by the hitch which engages en erin of the oggrie in the ioeking position thereofu bin connection with the 'devices on the em' for opereing the hitchk an interlocking heir 'i8 may oe employed ato-operating with the usuel eieei'rie conf'roiier 30 in such mi); #het the coniroiier must he brought io neutral" position or position for eutiinp; ofi' the inoive power hefore the cum 15 can he operated hjv he pedali. Such interiorking hor 18 is properiy eonneeieci 'with the peduhoperuefi ierer i9 which in turn, hy the horizontoi her 9,0, ectuntes the com 15 when the, pedal is depressed. The spring'4 f or returning said pochi-operated parte to normal position or inoperative position of the Cam india-aie@ ai: 21.' `When the pedal is operated :ift-er io neutrol positionto stop `ihe cer, the ioekine; her 18 enters n locking notch in n ruin i'nieued in dotted lines. 'i1-he en'irjir oi' the her permitting she cam to be thrown over and io thus ooi?. in. previous eonsrections o apparatus e, mechanical interioek is employed which, in its uorrnai position, ioeks the door against moremen; untii., being actuated hy the com., the leek is operated so es to free. the door. Seid meehzinicei interioek is'uiso Aso con struetedizhet in hoils the com in 'proieeie OSiiOUS img LLS ih@ 00F i5 015m and thus has on erin 1% erxuineiine; :ihm y or hei W hoigis he ioehing hm 18" @lgrgd Wh the' rho huir-ion Q3 in a reke onere so that, when. eonroiier so that; Seid contri'iiier muy not tb@ @ich {-mfn @un @XM-geg Gn gw bf" @PU-mid Em afi?? mi@ @WW img i190 iine 22 zinci the interoeking; eieotrieswieh 323i? 019505* th@ mgimnif'ff-i ii'l'iwi if; is onerui'ed renikringg;A it iiui'iossibe no oper freed io free the emu and eiiowii, to return am (jm, C@ 50 imm im 11h@ mi-@h ig yom to nomi@ Esitmh 3h15 nimil' fh@ con position for ioohi the, opernis'igern o?. 3??

- be mOYd the door. The singie -nterioeizug si iii looking :ration oi ine iueh fi' und e 1th@ saine rime, heinn igrie swieh 2i? i he np-i notion of he. interioeiziug s uireefiy described, iinriiher'o i ver off means oi: the eonroiier 3 impossihie unii he ini'erioein. i-'sviren restoreci to nornml position. Hence, though the release of pressure on, the neein may ziiiow he emu l5 and the her io resume norma-1 position and free the een froiier B0, the seine is kept eieeirieni inoperative, the, interlocking; Switch i phneoii the Qperetionseet-ing es anni, 'for the n'ieehenieni interioeinhefore rei izo which meehenicniiy hoifis 'he @ein er tencieri uni'ii ihe door is restored to dose-fi. position. n

'In my preseni construction @he e the riool.' frees zhe hitch i' io fiiior: inchino! su'ich 2? to resmne no1-mei po., ,i Whereupoii the eoniroier 3G hee-omen eieeirn muy operative in the usnei mijn Y Fig". i iliusi'rzi'es niodiieuion manner of operating' the inerioaking' e from lhe hitch 'i "when .sr-id switch is `ier switch or one eounnou to o nniinher eievzitor 'zioors es ries: 'i tion for pfiieu 'iiei Juf No, il'if. in his figure line extending; feriiesiiy pesi: i iioors und oneruii'eiy conuesi'eii swifeh ei i-he hfe'ifi of ihe eiersr or otheririee iocciiefh sairi iin@ i vided for eneh emiinf; with e imiion or hre eroi projection in posiion io he engaged hy n. deriee operiiiivei); eonneeizei wiifh ehe leech. in the present insieme the. inici i" ies@ penso with, hir invention muy hice vise he reeeiiijy' iii The operation of the apparatus, when einu eppiied t0 any pusphugion gysm mg i. ployed in Connection with the OGking bali ized in e manner Well uncierstoofi in ihe ori; 18, is as foilows: to automuticeijy'-(sion.the eer "when the When. the cer is stopped :it the iaudinp; seiecteci hv e mrcuhir push-nutren is in Fig. 5 wherein au operarinfr earn 'for i latch operating her (i is broughtingo ee Vin zhrouggh the interruption of e circuit wineh is caused to reke 'place uutomsitieeiiy rfi the seiected oor is reached by the ein'. inasmuch es cireuis emi arrangements of nir euiis for this purpose are ive-ii `ers in the, erh, .K ha ve shown, merely 'me fie' eonneced iinniefiiuteiy wih @iam causing the sume to operato on. die

ed with the cam and n @is bar 6. ln this figure 25 indicates an electric motor carried by the car. Said motor 1s enero'ized so long as the circuits are 1n condition to movethe car and operates a drum Qwhich winds up a cord or chain connectwith a rod 2T that, in the winding movement, stores power in a 'compressible spring 28 asv clearly indicated. While the motor is energized the cam is held by the motor inl inoperative position. When ,he ear reaches the floor,- automatic change fof circuit condition, resulting from the op- Ieration of the push-button system de-enervgizes said motor and the spring-28 then opcrates to throw the cam 15 and-bar 6 and thereby disengaging the latch 'i' so that the door may be then opened. This action, as before, results in the throwing of the interlocking switch before described scthat motive power for the elevator is no longerapplied and cannot be applied until the door operating mechanism is restored to position for permitting the latch 7 to drop to normal position or-position Where the door o ening and closing devices are located. en, however, it is desired to move the car away from the iioor the motor 25 becomes energized, thus withdrawing the c ain 15. and permitting the latch 7 and connected switch to resume their normal position, the door operating mechanism being th'en and thereafter locked until again freed by the automatic operation of the latch.

As will be seen, the oiiice of the electric motor 25 which is normally energized while the car is moving, is to hold the cam or other operating device in inoperative position byelectromagnetic action and to free the same for operation by the spring or other device when the car is at the selected landing, through interruption ot the charging` circuit for the electromagnet in the operation of the puslrbutton system. Other electromagnetic devices might be employed in a similar way in place of the motor 25.

The combination of electro-magnetic means on the car as shown in Fig. 5 cooperating with the elevator well door closing and opening mechanism, latch and power controlling switch, is not made the subject of specific claims herein since it forms the subject of a separate application filed as a.

division of the present case.

lVhat I claim as my invention is l. The 'combination with a door, of mechanism including a movable member for moving said door to open or closed position, a latch adapted to lock said movable mem ber against movement when said door is in vclosed position, and a power controlling switch operatively associated. with said latch, and means for simultaneously controlling said latch. and switch.

2. The combination with a door, of a door Closing and opening mechanism comprising ainfr one of said a pair of pivotally connected arms one of which is pivoted to the door and the other to a fixed bracket or abutment, a latch cnarms and adapted to hold the same in door closing position, and a power controlling switch connected to said latch and ada ted to change the condition of an electric circuit when the latchis moved to free the arm.

3. The combination with a door closingr and opening mechanism comprising toggle arms or levers pivotally connected together. of a latch engaging the fixedly mounted member and a power controlling switch operatively connected with sa1`d latch.

4. The combination with a door opening and closing mechanism, of a latch engaging a member thereof to hold it against movement and in the closed position of the door, a power controlling electric switch operatively connected to the latch, an actuating rod adapted to engage the latch to free the mechanism and means upon the car for operating said rod or bar at the landing.

5. The combinationwith a door opening and closing mechanism including a movable door operating member, of a latch engaging said member to hold it against movement and in the closed position or" vthe door, a power controlling electric switch connected to said latch, an electric controller on the car, a lock therefor, and means upon the ear for operating said lock and said latch simultaneously. y

6. The combination of an elevator well door, a lock therefor, an electric switch, an elevator car provided with an electric controller, and' means u )on the car interloeked with said controller ier operating said locking means and switch simultaneously when the car has been brought to rest at a landingl by the operation of the controller.

7. The combination with an elevator well door and operating mechanism therefor. ot' a latch normally 1oz-king the same, au electric switch connected to said latch,A actua" ing means on the car for operating said latch when the car is at a landing, an .electric controller on the car and means holding said actuating means out of action while the controller is in position to cause the car to move.

8. The combination witl a door and an operating lever therefor for moving the same to open or closed position, latch engaging and locking said lever in door closing position, adapted to ride thereon when the lever is moved away from such position to open the door, and a power controlling electric switch operatively conlg'l nected with the latch.

9. The combination with a door, of a pair of toggle arms pivotally connected and adapted in normal position to lock the door against movement, a latch engaging one of llo of a pivoted said syste to permit the door to be moved.

open

'arms and adapted to lockfthe toggle mea'is for acting simultaneously on said m and means for operating thelatch latch and switch operable from the elevator 10 om* when th The combination with n door and the Signed at ing and closing mechanism therefor, of New York adapted to lock a member -of said mechansm in the closed position of. the doorend e car is et a landing.

New York, in the county of and Stute of New York, 'this 1st day ofAugust IA. D. 1923.

oLFFoRD NoRToN.. 

